  use Chart::Graph::Gnuplot qw(gnuplot);

  gnuplot({'title' => 'foo',
           'x2-axis label' => 'bar',
           'logscale x2' => '1',
           'logscale y' => '1',
           'output type' => 'png',
           'output file' => 'gnuplot1.png',
           'xtics' => [ ['small\nfoo', 10], ['medium\nfoo', 20], ['large\nfoo', 30] ],
           'ytics' => [10,20,30,40,50],
           'extra_opts' => 'set key left top Left'},
          [{'title' => 'data1',
            'type' => 'matrix'}, [[1, 10],
                                  [2, 20],
                                  [3, 30]] ],
          [{'title' => 'data2',
            'style' => 'lines',
            'type' => 'columns'}, [8, 26, 50, 60, 70],
                                  [5, 28, 50, 60, 70] ],
          [{'title' => 'data3',
            'style' => 'lines',
            'type' => 'file'}, './samplefile'],);

